/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/MeshBevel.h
Unlink phase - disconnect triangles along bevel edges/loops, and at vertices. Vertices may expand out into multiple "wedges" depending on incoming bevel-edge topology.
void UnlinkEdges ( [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) & Mesh, [FDynamicMeshChangeTracker](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshChangeTracker) * ChangeTracker )